Biology 9700 · AS & A Level · Movement into and out of cells

Movement into and out of cells — practice question

Electrical impulses travelling through the cardiac muscle coordinate the contraction of the heart. Which option gives the correct order for part of the sequence of these impulses?

  • Aright and left atria  sinotrial node  atrioventricular node  ventricular walls
  • Bsinotrial node  right and left atria  atrioventricular node  Purkyne tissue
  • Csinotrial node  right and left atria  Purkyne tissue  atrioventricular node
  • Dsinotrial node  right and left atria  Purkyne tissue  ventricular walls

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